SAP ABAP (dd.mm.yyyy) format to sy-datum Function

DATA: INPUT_DATE TYPE CHAR10 VALUE '01.01.2019'. "input

DATA: P_DATUM LIKE SY-DATUM.

CALL FUNCTION 'CONVERSION_EXIT_IDATE_INPUT'
  EXPORTING
    INPUT         = INPUT_DATE
  IMPORTING
    OUTPUT        = P_DATUM.